I was away for 3 days and when I returned I noticed I didnt see my yellow tang! I looked inbetween the liveock and cant find ANY trace of him! He was super healty and I had him for over a year. I just cant figure it out. I looked all over the floor with no success.... what might have happend??? I have a small lion fish, clarkii clown, small niger trigger, bird wrass and a blue damsel. Is it possible that the Lion stung him and killed him??? HELP!